Very low current ratio current transformers.
The RHM International dry type HV DryShield® insulation system is well suited to provide very low current/ high voltage detection. Our Current Transformers for capacitor bank protection have all the features and characteristics of the standard LRGBJ series, plus the specific attributes to provide unmatched protection for shunt capacitor bank applications. This allows dramatic savings in the design of shunt capacitor banks as well as a high level of security.
All products comply with IEC 61869-2, IEEE C57.13 and CAN / CSA C61869-2 standards.
Key Specific Characteristics
| Max Voltage Um (kV) | Rated Voltage (kV) | Rated Power Frequency Withstand voltage 1 min. (kV) | Rated switching impulse withstand voltage (kV) | Rated lightning impulse withstand voltage (kV) |
|
| Dry test | Wet test | ||||
| 40.5 | 35 | 100 | 80 | / | 185 |
| 72.5 | 66 | 155 | 140 | / | 350 |
| 145 | 110 | 275 | 230 | / | 650 |
| 252 | 220 | 460 | 395 | / | 1050 |
| 363 | 330 | 510 | 510 | 950 | 1175 |
| 550 | 500 | 680 | 680 | 1175 | 1550 |
| Rated primary current (A) | 0.5 | 1 | 2 | 2.5 | 3 | 4 | 5 | 10 |
| Rated short time thermal current (Ith) (kA) | 0.72 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 2.5 | 4.5 |
- Rated secondary current: 1 A, 5 A
- Accuracy Classes: in order to get the most sensitive detection we are using measuring classes. The accuracy classes proposed are: 0.2S, 0.2, 0.5S, 0.5
All other specifications and characteristics are identical to our initial LRGBJ series and can be found in the associated specification sheet.
More Information
To view our brochure, click here to learn more about Shunt Capacitor Bank Applications.
